Supporting device



FIG. 1 is a perspective view of a supporting device showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view showing the supporting device in use.

The broken line showing of environmental structures is for illustrative purposes only and forms no Part of the claimed design. 

The ornamental design for a supporting device, as shown and described. 